A substantial amendment consists of the recital of facts constituting the offense charged and determinative of the jurisdiction of the court.  All other matters are merely of form. The following have been held to be mere formal amendments: (1) new allegations which relate only to the range of the penalty that the court might impose in the event of conviction; (2) an amendment which does not charge another offense different or distinct from that charged in the original one; (3) additional allegations which do not alter the prosecution's theory of the case so as to cause surprise to the accused and affect the form of defense he has or will assume; (4) an amendment which does not adversely affect any substantial right of the accused; and (5) an amendment that merely adds specifications to eliminate vagueness in the information and not to introduce new and material facts, and merely states with additional precision something which is already contained in the original information and which adds nothing essential for conviction for the crime charged.

The test as to whether a defendant is prejudiced by the amendment is whether a defense under the information as it originally stood would be available after the amendment is made, and whether any evidence defendant might have would be equally applicable to the information in the one form as in the other.  An amendment to an information which does not change the nature of the crime alleged therein does not affect the essence of the offense or cause surprise or deprive the accused of an opportunity to meet the new averment had each been held to be one of form and not of substance.^[55] (emphasis and underscoring supplied)

[ G.R. No. 182677, August 03, 2010 ]

JOSE ANTONIO C. LEVISTE, PETITIONER, VS. HON. ELMO M. ALAMEDA, HON. RAUL M. GONZALEZ, HON. EMMANUEL Y. VELASCO, HEIRS OF THE LATE RAFAEL DE LAS ALAS, RESPONDENTS.